1. Michael Bagnall
  2. image_math

Overview

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Image Math CAPTCHA For Drupal

This module is an add-on for the CAPTCHA module to provide a mathematical equation challenge as a CAPTCHA. The question presented is an image instead of text to prevent auto-crawling and parsing via robots. Images are created on the fly much like the Image CAPTCHA module that comes with CAPTCHA.

This module used Image CAPTCHA as a foundation and was modified from that. So all due credit to the creators of CAPTCHA for providing that starting point